/Engine/Plugins/Runtime/GeometryProcessing/Source/DynamicMesh/Public/Selections/GeometrySelectionUtil.h
Call TriangleFunc for each mesh TriangleID included in MeshSelection, where MeshSelection has polygroup topology. For Polygroup Faces, all triangles in the face are included. For Polygroup Edges, currently all triangles in any group adjacent to the edge For Polygroup Corners, currently all triangles in any group touching the corner
namespace UE { namespace Geometry { bool UE::Geometry::EnumeratePolygroupSelectionTriangles ( const [FGeometrySelection](API\Plugins\DynamicMesh\Selections\FGeometrySelection) & MeshSelection, const [UE::Geometry::FDynamicMesh3](API\Runtime\GeometryCore\DynamicMesh\FDynamicMesh3) & Mesh, const [UE::Geometry::FPolygroupSet](API\Plugins\DynamicMesh\Polygroups\FPolygroupSet) & GroupSet, [TFunctionRef](API\Runtime\Core\GenericPlatform\TFunctionRef)< void(int32)> TriangleFunc ) } }